fix(revalidate): include linked patch evidence

[vincentkoc]

Summary

• include linked patch attempts and validation outcomes during revalidation
• include bounded, repository-contained current file context for changed files
• redact patch plans and command output from provider prompts
• add a C# regression covering a validated repair

Fixes #124

Validation

• pnpm test src/workflow.test.ts
• pnpm typecheck
• pnpm lint
• pnpm format:check
• pnpm build
• autoreview: clean

[clawsweeper]

ClawSweeper status: review started.

I am starting a fresh review of this pull request: fix(revalidate): include linked patch evidence This is item 1/1 in the current shard. Shard 0/1.

This placeholder means the worker is alive and reading the current context. I will edit this same comment with the actual review when the claws are done clicking.

Crustacean status: shell secured, claws on keyboard, evidence pebbles being sorted.